A. When you're doodling, you lose focus because usually you'll try to put skills and techniques into your doodle.
B. Thinking about the future can completely distract you from almost anything. You stop hearing and you stop seeing. It as if everything in your senses are gone until you refocus. This is basically zoning out.
C. Looking at other people in the audience can cause someone or something to catch your attention and distract you.
D. Some people will stare at their hands to feel less anxiety. Unless you begin thinking of something else, staring at your hands is the only option that will help you avoid being distracted by people, things around the speaker/actors, etc. D is your answer.
